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赞👍。加拿大的防疫过程,你观察得很仔细。不过,谭医生在十几年前萨斯流行的时候,就写了文章说,戴口罩可以有效防疫。不知道为什么这次又反过来说。是不是联邦的统一部署,就不知道了。😂😂

newrover (漫游)
(#13114446@0)
7-30 -04:00
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